M=998244353
n=int(input())
A=list(map(int,input().split()))
B=list(map(int,input().split()))
C=A+B
C.sort()
C=C[:n]
A=set(A)
B=set(B)
a=0
for i in C:
    if i in A:
        a+=1
ans=1
for i in range(1,a+1):
    ans*=i
    ans%=M
for i in range(1,n-a+1):
    ans*=i
    ans%=M
print(ans%M)